[Regression] metaModel is no longer available in metaObjects

[hamza-hajji]

Describe the bug
Meta model is no longer available in meta objects

To Reproduce
Steps to reproduce the behavior:

Render the example XKT model

const viewer = new Viewer({
  canvasId: "myCanvas",
  transparent: true,
  saoEnabled: false,
});

viewer.scene.camera.eye = [
  14.915582703146043, 14.396781491179095, 5.431098754133695,
];
viewer.scene.camera.look = [
  6.599999999999998, 8.34099990051474, -4.159999575600315,
];
viewer.scene.camera.up = [
  -0.2820584034861215, 0.9025563895259413, -0.3253229483893775,
];

const xktLoader = new XKTLoaderPlugin(viewer);

const sceneModel = xktLoader.load({
  id: "myModel",
  src: "./models/Duplex_A_20110505.glTFEmbedded.xkt",
  saoEnabled: false,
  edges: true,
  dtxEnabled: true,
});

Try to log any metaObject viewer.metaScene.metaObjects['06uoIsbYr35x9JXU7VZ77u'], its metaModel is null

Expected behavior
The meta model is there

Screenshots
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